JP2001304207A - Fastening structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide fastening structure to decrease an assembly load through simple constitution. SOLUTION: After a first columnar part 68 of a key rod 40 is fitted in hooks 36 and 38, it is rotated approximately in a 90 deg. arc in the direction of an arrow mark C formed around its axis. Since a diameter in a vertical direction extending from the center of the first columnar part 68 approximately formed in an oblong shape in cross section toward an under surface 50 of the hook 36 is increased with the progress of rotation, a press force increased with the increase of a rotation angle is exerted on an outer peripheral surface 72 from the under surface 50. Thereby, an upper surface 46 of a flange 30 is pressed toward a flange 28 of a case 16 by the part, situated at a lower end, of its outer peripheral surface 72 and the flanges 28 and 30 and an element peripheral edge part 26 nipped therebetween are forcibly contracted based on the press force, resulting in fastening together of a case 16 and a cap 22 through simple operation being only rotation after fitting of the first columnar part 68 in recessed parts 54 and 60 of the hooks 36 and 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device for fastening two parts at a peripheral portion.

[0002]

2. Description of the Related Art For example, an air cleaner device for a vehicle includes:
A case (first housing) having a first opening and an air inlet, a cap (second housing) having a second opening facing the first opening and an air outlet, and a seal attached to an outer peripheral edge portion The member is composed of a filter element and the like sandwiched between the peripheral portions of the case and the cap. The case and the cap are integrated so as to be relatively rotatable around the hinge, for example, by connecting one side of the peripheral portion by a hinge structure, and the peripheral portions are overlapped with the filter element interposed therebetween. As a result, in a state where the first opening and the second opening are mutually closed, the other side of the peripheral edge portion is fastened using a metal clamp or the like.

[0003]

FIG. 21 shows an example of the above-described fastening structure described in, for example, JP-A-8-28033. In the figure, a clamp 194 is attached to a flange 192 protruding outward on the upper edge of the case 190 so as to be rotatable around an axis perpendicular to the plane of the drawing. The clamp 194 is formed by bending a thin metal plate in the plane direction so as to be separated from the flange 192 at an intermediate portion in the longitudinal direction, and has a flange 192 at a tip end side opposite to the rotation axis. It has an engagement portion 196 that is formed by being further greatly curved toward the side.
When fastening the case 190 and the cap 198 with such a clamp 194, the flanges 192,
00, the clamp 194 is rotated counterclockwise in the figure, and the operating portion 202 provided at the tip is pressed toward the cap 198 so that the engaging portion 196 is hooked on the flange 200.

[0004] However, the clamp 19 as described above.
4, the acting force F1 required for fastening is
The force F2 when the engaging portion 196 gets over the corner of the edge of the flange 200 is given by F1 = (L2 / L1) F2. Here, L2 is determined by the thickness of the flanges 192 and 200 and the thickness of the filter element which is omitted in the drawing, and cannot be set freely. For this reason, in the engine room of a vehicle where it is desired to reduce useless space as much as possible, L1 cannot be set so long as L2, so that the assembling load at the time of fastening cannot be reduced and workability can be reduced. Had a bad problem. Such a problem,
The fastening structure is not limited to the fastening structure of the air cleaner of the vehicle as described above, and a fastening structure in which two parts are overlapped on their peripheral portions and fastened by a clamp or the like may similarly occur.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fastening structure capable of reducing an assembling load with a simple configuration.

[0006]

Means for Solving the Problems (First Embodiment) The gist of the present invention for achieving such an object is as follows.
A fastening structure for fastening the first component and the second component by overlapping the first peripheral edge of the first component and the second peripheral edge of the second component and pressing each other with the fastening component, a) A first sliding contact surface facing the second peripheral portion is provided at a position opposite to the first component with respect to the second peripheral portion, and extends from the first component toward the second component. A first engagement portion, (b) a second engagement portion provided on the fastening component so as to be engaged with the first engagement portion so as to be relatively rotatable around a predetermined rotation axis, c) the fastening component is the first
The second engaging portion is provided on the second engaging portion so as to be in contact with the first sliding contact surface in a state of being engaged with the engaging portion, and the fastening component is rotated in a fastening direction about the predetermined rotation axis. (D) the second sliding contact surface having a greater pressing force applied from the first sliding contact surface;
A peripheral portion pressing surface provided on the fastening component so as to press a peripheral portion toward the first peripheral portion, and (e) the second engaging portion is fixed to the first engaging portion with respect to the first engaging portion. And an operation unit provided on the fastening component at a position separated from the rotation axis by a predetermined distance so as to rotate around the rotation axis.

[0007]

In this way, the first component and the second component
The first and second peripheral portions of the component are overlapped with each other, and the second engaging portion of the fastening component is engaged with the first engaging portion extending from the first component, and the operation of the fastening component is performed. When the second engaging portion is rotated in the fastening direction with respect to the first engaging portion by operating the portion, the second sliding portion moves from the first sliding contact surface toward the second peripheral portion toward the second sliding contact surface. The pressing force acts according to the amount of rotation, and the peripheral portion pressing surface of the fastening component presses the second peripheral portion toward the first peripheral portion based on the pressing force, whereby the first peripheral portion and the first peripheral portion are pressed. Two peripheral edges are fastened.
At this time, the force required for the rotation of the second engagement portion, that is, the assembling load, is equal to the distance between the rotation axis and the operation portion with respect to the distance between the fulcrum and the operating point from the rotation axis to the peripheral edge pressing surface. As the distance between the fulcrum and the force point becomes longer, the distance becomes smaller.
The value can be set to a small value irrespective of the thickness dimension of the first peripheral portion and the second peripheral portion. Therefore, a fastening structure that can reduce the assembling load with a simple configuration can be obtained.

[0008]

According to another aspect of the present invention, there is provided a fastening structure according to a second aspect for achieving the above object, wherein the second sliding contact surface is connected to the fastening structure according to the first aspect. In this state, the pressing force applied from the first sliding contact surface is smaller than the pressing force at a position where the second engagement portion is slightly rotated in the direction opposite to the fastening direction, that is, slightly in the loosening direction. It is provided. If you do this,
In order to release the fastening state, it is necessary to apply a pressing force larger than the value in the fastening state from the first sliding contact surface to the second sliding contact surface. Therefore, it is possible to preferably suppress the occurrence of disconnection due to rotation in the direction opposite to the fastening direction. The “pressing force that increases as the relative rotation is performed in the fastening direction” is not limited to a condition in which this condition is strictly satisfied in the entire region of the relative rotation between the second engagement portion and the first engagement portion. It suffices if the overall tendency is to increase in the fastening direction, and the magnitude relationship of the pressing force may be reversed near the fastening completion position as described above.

Preferably, in a third aspect of the present invention, there is provided the fastening structure according to the first aspect, wherein the fastening component is provided at an axially intermediate portion of the first columnar portion. A second columnar portion is formed in a T-shape perpendicular to the axial direction, and the first engagement portion is formed by a leg extending from the first peripheral portion toward the second component. And a first sliding contact provided with the first sliding contact surface extending from the tip of the leg along the second peripheral edge and parallel to a surface of the second peripheral edge opposite to the first component. And the second engaging portion is formed by one end of the first columnar portion, the axial direction of which is perpendicular to the longitudinal direction of the second peripheral portion and the first sliding contact surface. It is configured so as to be fitted between the surface of the second peripheral portion and the first sliding contact surface in a parallel direction and to be rotated around its axis. The second sliding contact surface is provided on an outer peripheral surface of the second engaging portion, and a rotation shaft at a position contacting the first sliding contact surface as the second engaging portion is rotated in the fastening direction. The distance from the center is configured to increase, the peripheral edge pressing surface is configured by a portion of the outer peripheral surface of the first columnar portion that is located on the opposite side in the circumferential direction from the second sliding contact surface, The operating portion is constituted by a tip portion of the second columnar portion opposite to the first columnar portion.

In this case, the second engaging portion is engaged between the surface of the second peripheral portion and the first sliding contact surface to engage with the first engaging portion, and the second columnar portion is formed. By rotating the operating part constituted by the tip in a plane perpendicular to the axial direction of the first columnar part, that is, in a plane parallel to the side surface of the second part,
The second sliding surface, whose distance from the rotation axis increases as it is rotated in the fastening direction, is pressed by the first sliding surface, and the second peripheral edge is pressed by the peripheral edge pressing surface of the second engaging portion. The portion is pressed toward the first peripheral portion, and the first component and the second component are fastened.
Therefore, a strong fastening state can be obtained by a simple operation of merely fitting the second engagement portion into the first engagement portion and rotating the first engagement portion. In addition, since the rotation direction of the operation unit is in a plane parallel to the side surface of the second component, the distance between the force point and the fulcrum can be increased without securing a space for the rotation. The applied load can be reduced.

Further, the fastening structure according to the third aspect is more preferably provided on a side surface of the second component at a position facing the first engagement portion, and the second structure of the first columnar portion.
A third engaging portion that suppresses movement of the first columnar portion in a direction perpendicular to the axial direction by fitting the other end opposite to the engaging portion. With this configuration, since unnecessary movement of the first columnar portion in a direction perpendicular to the axial direction is suppressed by the third engagement portion, the second engagement portion can be more easily rotated. At the same time, disengagement due to the movement of the other end is further suppressed.

Further, the fastening structure according to the third aspect is more preferably a fitting convex portion which is fitted to each other in a fastened state to thereby suppress the movement of the second columnar portion in the axial direction. A fitting recess is provided on the surface of the second peripheral portion and on one and the other of the first columnar portion. With this configuration, in the fastened state, the movement of the second columnar portion in the axial direction is suppressed, so that the unfastened state is further suppressed. For example, in the aspect provided with the third engagement portion as described above, the first engagement portion is connected to the first engagement portion.
The other end of the columnar portion is prevented from coming off, and thus the second engagement portion and the first engagement portion are prevented from coming off from engagement. The fitting recess is configured by, for example, one or more peripheral grooves provided in the first columnar portion, and the fitting protrusion is configured by, for example, a protrusion provided on the surface of the second peripheral portion. .

Further, in the fastening structure according to the third aspect, more preferably, the major axis direction extends from the surface of the second peripheral portion toward the first sliding contact surface when the second columnar portion is in a fastening state. It has a substantially coincident elliptical cross section. With this configuration, the distance from the rotation axis to the second sliding contact surface at the contact portion with the first sliding contact surface is gradually increased by rotating the second engaging portion in the fastening direction. Therefore, the first peripheral portion and the second peripheral portion can be fastened while being pressed. More preferably, both ends of the second columnar portion in the major axis direction in the cross section form a substantially flat surface. With this configuration, the substantially flat surface in the fastening state is the first surface.
Since it is pressed against the sliding contact surface, rotation in the direction opposite to the fastening direction from the fastening state, that is, disconnection can be suitably suppressed.

In the fastening structure according to the third aspect, more preferably, the first engaging portion has a hook shape in which a tip side of the first sliding contact portion is open. With this configuration, the second engaging portion is connected to the first sliding contact surface with the second sliding portion from the opening side.
Since it can be fitted between the surface of the peripheral portion and the first sliding contact portion, the first engaging portion is formed in a square shape by being spanned between the tip portions of the pair of leg portions. The second engagement portion can be more easily engaged with the first engagement portion as compared with the first embodiment.

Preferably, in a fourth aspect of the present invention, there is provided the fastening structure of the first aspect, wherein the first engaging portion is provided on a surface of the second peripheral portion. Is formed in a cylindrical shape whose axis is parallel to the direction perpendicular to the first component, and is protruded in a radial direction at a position separated from the first component with respect to the surface thereof, and is provided on the outer peripheral surface of the second peripheral portion on the surface side of the second peripheral portion. A portion provided with an engagement convex portion functioning as the first sliding contact surface, and the second engagement portion is provided with an inner peripheral surface opposed to an outer peripheral surface of the first engagement portion. The second sliding contact surface is configured to be engaged with the outer peripheral side, and a portion that contacts the engaging convex portion on the surface side of the second engaging portion located on the opposite side to the second peripheral portion. The outer periphery of the inner peripheral surface having a slope separated from the second peripheral portion as the second engagement portion is rotated in the fastening direction. It is obtained by forming in.

With this configuration, the second engaging portion is engaged with the outer peripheral side of the first engaging portion, and the second engaging portion is brought into sliding contact with the engaging convex portion on the second sliding contact surface. When the engagement protrusion is rotated in the fastening direction with respect to the first engagement portion, the engagement protrusion is slidably contacted with the second slide contact surface according to the inclination of the second slide contact surface, and is separated from the second peripheral edge portion. Will be guided to. Therefore, the pressing force acting on the second sliding contact surface is increased, and the entire fastening component is pressed toward the second peripheral portion side, so that the peripheral portion pressing surface moves the second peripheral portion to the first peripheral portion. They are pressed toward the periphery, and they are fastened in a pressed state.

In the above-mentioned fourth aspect, more preferably, the second sliding contact surface is located at one end in the direction away from the second peripheral edge portion and slightly more than the other end portion. It includes an engagement convex portion fixing groove formed by reducing the interval with the second peripheral portion. With this configuration, the pressing force acting on the second sliding contact surface from the engagement convex portion located in the engagement convex portion fixing groove is smaller than the case where the engagement convex portion is located on the other end side. Is smaller than the pressing force.
Therefore, a fastening state that is not easily disengaged even when an external factor such as vibration acts is suitably realized.

In the fourth aspect, more preferably, the center of the first engagement portion, that is, the rotation axis, is provided on the surface of the second peripheral portion and the back surface of the fastening component so as to be in contact with each other. One and the other of the circumferential projection and the circumferential groove fitted to each other on the concentric circle with the center are provided.
With this configuration, when the fastening component is rotated, the rotation axis can be easily maintained in alignment with the axis of the first engagement portion. Fastening of two parts becomes easier.

Preferably, in a fastening structure according to a fifth aspect of the present invention, in order to achieve the above-mentioned object, in the fastening structure according to the first aspect, the first engaging portion is provided with the second peripheral portion. It has a cylindrical shape whose axial direction extends along the direction perpendicular to the surface,
And a peripheral groove formed on the outer peripheral surface so as to be separated from the distal end as it proceeds in one direction in the circumferential direction, the peripheral groove functioning as the first sliding contact surface, and from the distal end surface to the peripheral groove. With a series of outlets,
The second engaging portion has an inner peripheral surface opposed to the outer peripheral surface of the first engaging portion and is configured to be engaged with the outer peripheral side thereof. The outer peripheral surface of the projection protruding from the inner peripheral surface of the engaging portion and fitted into the peripheral groove is constituted by the distal end portion.

With this configuration, the second engaging portion is engaged with the outer peripheral side of the first engaging portion, and the projection provided on the inner peripheral surface is fitted into the peripheral groove via the insertion port. After being inserted, when the second engaging portion is rotated in the one direction, that is, the fastening direction with respect to the first engaging portion, the outer periphery is formed according to the inclination of the inner wall surface on the distal end side of the circumferential groove functioning as the first sliding contact surface. The surface of the second engaging portion, whose surface functions as a second sliding contact surface, is guided in a direction approaching the second peripheral edge portion while sliding on the inner wall surface on the distal end side. Therefore, the pressing force acting on the projection from the inner wall surface on the distal end side is increased with the approach, so that the entire fastening component is secondarily moved.
By being pressed toward the peripheral portion, the peripheral portion pressing surface is pressed at the second peripheral portion toward the first peripheral portion, and they are fastened in a pressed state.

In the fifth aspect, more preferably, a pair of the inlet and the circumferential groove are provided at target positions in the circumferential direction on the outer peripheral surface of the first engaging portion, and the protrusion is formed of a pair of the circumferential portions. A pair fitted into the groove is provided on the inner peripheral surface of the second engaging portion. With this configuration, since the pair of circumferential grooves and the projections are provided at symmetrical positions, the second engagement portion is substantially uniformly distributed in the circumferential direction from the first engagement portion via the pair of projections. Pressed. Therefore, the second
During a fastening operation in which the engaging portion is rotated relative to the first engaging portion, an increase in an assembling load caused by the second engaging portion being inclined with respect to the first engaging portion is preferably performed. The first engagement portion can be more easily fastened by being suppressed, and the inclination of the first engagement portion with respect to the axial direction in the fastened state is suppressed, and the occurrence of disengagement is further suppressed.

Also, preferably, a sixth aspect of the present invention includes:
In any of the first to fifth aspects, the first component and the second component sandwich a third component having a lower elastic modulus than the first and second peripheral portions between the first and second peripheral portions. It is concluded. With this configuration, when the pressing force acting from the first sliding contact surface to the second sliding contact surface is increased,
Only the third part is elastically deformed, so that a stronger fastening structure corresponding to the elastic modulus and the restoring force can be obtained.

Preferably, in the sixth aspect, the first component and the second component are connected to a vehicle air / air component.
One and the other of the case and the cap of the cleaner device, and the third part is a filter element housed therebetween. With this configuration, the volume of the air cleaner device, which is required to be as small as possible for installation and maintenance, is provided in the engine room, so that the volume of the air cleaner device is reduced to the fastening structure. The increase due to this is preferably suppressed.

Preferably, the first component, the second component, and the fastening component are all made of resin. In the fastening structure of each of the above aspects, the amount of elastic deformation required for a fastening part or the like is smaller than that of a conventionally used metal clamp, so that a resin having a larger elastic modulus than metal can be used. . Therefore, since the fastening part can be molded using a single mold at the same time as the first part or the second part, the manufacturing process is simplified, and the manufacturing cost is lower than when metal parts are used. There is.

[0025] More preferably, said fastening part is formed in a state of being connected to one of the first part and the second part. According to this configuration, since the fastening component is formed integrally with the first component or the second component, the first component is maintained by maintaining the integrated state during storage or transportation. In addition, it is possible to reduce the trouble of managing small fastening parts as compared with the second parts. If there is no problem in fastening the first component and the second component, the fastening component may be used while being integrated with the first component and the second component. If it is necessary to separate the first component and the second component from each other, they may be separated at the assembly site.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 and 2 are a front view and a plan view, respectively, showing the entirety of an air cleaner device 10 to which the fastening structure of the present invention is applied. In both figures, the air cleaner device 10 includes a case 16 having an air inlet 12 and an opening 14 and a cap 22 having an air outlet 18 and an opening 20 with the openings 14 and 20 facing each other and being mutually closed. Are combined as
A substantially airtight internal space is formed between them. For example, a screw or the like for fixing the case 16 in the engine room of the vehicle is provided at an appropriate position on the outer peripheral surface, but is omitted in the drawing. Both the case 16 and the cap 22 are made of a thermosetting resin. In the present embodiment, the case 16 corresponds to a first component, and the cap 22 corresponds to a second component.

In FIG. 1, a filter element 24 is provided inside a container formed by cutting out a part of the vicinity of the boundary between the case 16 and the cap 22 to show the internal structure thereof. Provided. The filter element 24 has its peripheral portion 26
The cap 22 is held by being sandwiched between flanges 28 and 30 provided so as to extend outward from the entire periphery of the open end of the cap 22, and is located at an intermediate portion in the height direction in the container. The element peripheral edge portion 26 is made of, for example, rubber or resin
It is held in a state of being elastically compressed by 8, 30. In addition, in FIG. 5 mentioned later, the case where the peripheral part 26 was comprised only by rubber was shown for convenience.
In the present embodiment, the flanges 28 and 30 correspond to the first peripheral portion and the second peripheral portion, respectively.

A pair of hinge devices 32 is provided on one side of the boundary between the case 16 and the cap 22 at the left end in FIGS. 1 and 2.
The hinge device 32 can be rotated around the axis perpendicular to the plane of FIG. FIG.
When the cap 22 is rotated counterclockwise from the position shown in FIG. 2, the other side located at the right end in the drawing opposite to the side on which the hinge device 26 is provided is separated from each other, and the case 16 and the cap 22 is opened, and a flange 28 of the element peripheral portion 26,
The holding state by 30 is released. The filter element 24 provided inside can be replaced by opening the inside in this way. Note that the hinge device 32 is configured by, for example, fitting portions of the case 16 and the flanges 28 and 30 of the cap 22 that protrude from the flanges 28 and 30 to each other. The details thereof are necessary for understanding the present embodiment. Therefore, the description is omitted.

On the other hand, of the flanges 28 and 30, the hinge device 32
The two sides parallel to each other from the one side provided to the other side to be opened are provided with, for example, a pair of fastening devices 34 at the other side, that is, at a position near the open end side. The fastening device 34 is for maintaining the case 16 and the cap 22 in a substantially sealed fastening state in which the flanges 28 and 30 are overlapped with each other via the filter element 24. And a hook 38 provided on the flange 30 of the cap 22 so as to face the tip of the hook 36 so as to protrude outward from the cap 22 and extend toward the cap 22.
And a key rod 40 engaged with the hooks 36 and 38.
It is constituted by and. Each of the hooks 36 and 38 and the key stick 40 is made of the same thermosetting resin material as the case 16 and the cap 22, and is an independent member as described later. In this embodiment, the hook 3
Reference numeral 6 corresponds to the first engaging portion, and hook 38 corresponds to the third engaging portion.

FIGS. 3 and 4 are a front view and a plan view, respectively, for explaining the configuration of the above-mentioned fastening device 34, which shows the essential parts in FIGS. 1 and 2 in an enlarged scale, respectively.
FIG. 5 is a sectional view taken along line VV in FIG. 4. Hook 36
Is below the flange 30 of the cap 22 (the case 16 side)
At its first portion (lower end) 42 which is continuous with the side wall of the case 16,
A second portion 44 extending upward with a narrower width than the first portion 42 so as to be separated from the case 16 at an upper end located above the flange 30 (toward the cap 22), and a second portion thereof. A third portion 48 extends in parallel from the upper end of 44 to the upper surface 46 of the collar 30. Therefore, the hook 36
The upper part of the part located above the collar 30 has the upper end shown in FIG.
4 and the lower surface 50 of the third portion 48 facing the flange 30 is bent rightward and the right end thereof is open, and is parallel to the upper surface 52 of the first portion 42. I have. Thereby, the hook 36 has the first portion 42,
3, between the second portion 44 and the third portion 48,
4 is formed with a recess 54 whose right end is open.
The upper surface 52 of the first portion 42 is located substantially on the same plane as the upper surface 46 of the flange 30 or slightly below the upper surface 46 in the fastening state shown in FIG. In this embodiment,
The first portion 42 and the second portion 44 correspond to the legs, the third portion 48 corresponds to the first sliding contact portion, and the lower surface 50 thereof corresponds to the first sliding contact surface.

On the other hand, the hook 38 has a first portion 56 extending upward from above the flange 30 and a flange 30 extending from the tip thereof.
And a second portion 58 extending in parallel with the upper surface 46 of the second member. The first portion 56 is continuous with the collar 30, and
Portion 58 is continuous with the side wall of the cap 22. Therefore, the hook 38 has an upper end bent rightward in FIGS. 3 and 4 and has a hook shape with its right end opened, and the right end in FIGS. 3 and 4 between the flange 30 and the side wall of the cap 22. An open recess 60 is formed. The inner surface of the hook-shaped portion, that is, the inner surface 62 of the first portion 56 and the lower surface 64 of the second portion 58 are such that the inner surface 62 is flush with the inner surface 66 of the second portion 44 of the hook 36, 64 is flush with or slightly above the lower surface 50 of the third portion 48 of the hook 36.

The key rod 40 includes a first columnar portion 68 having a columnar shape with a substantially elliptical cross section, and an axis extending from a central portion in the axial direction of the first columnar portion 68 along a direction substantially perpendicular thereto. A second columnar portion 7 having a columnar shape with a substantially circular cross section extending in the center direction.
0, and the whole has a T-shape. First
The columnar portion 68 has a pair of flat surfaces 7 at both ends of the outer peripheral surface 72 in the direction of the major axis of the cross section having a substantially elliptical shape.
4, and the second columnar portion 70 is continuous with the center of the portion between the pair of flat surfaces 74 in the outer peripheral surface 72 of the first columnar portion 68. The diameter of the second pillar 70 is the first pillar 68
The pair of flat surfaces 74 protrude more in the radial direction than the second columnar portion 70 because they are substantially equal to the minor diameter of the second columnar portion 70. In addition, the short diameter of the first columnar portion 68 is equal to or greater than the distance A between the upper and lower surfaces 50 and 52 of the hook 36, and the upper and lower surfaces 64 of the hook 38,
46, which is slightly smaller than the interval of 46 and has a long diameter (flat surfaces 74, 74
Are mutually equal to or slightly larger than the interval A.

The key rod 40 having such a shape can be used to replace the hooks 36, 3 when the filter element 24 having an open space between the case 16 and the cap 22 is replaced.
8 and when the case 16 and the cap 22 are fastened, the following operation is performed. First,
After closing the case 16 and the cap 22 in the state shown in FIG. 1 and the like, the axial direction of the first columnar portion 68 is substantially perpendicular to the edge of the flange 30 and substantially parallel to the upper surface 46 thereof. The first columnar portion 68 is configured such that a portion closer to one end face than the second columnar portion 70 enters the recess 54 in the hook 36 and a portion closer to the other end face enters the recess 60 in the hook 38. 1, 3 and the like, the first columnar portion 68 is fitted in the direction of arrow B shown in FIG. At this stage, the flange 30 of the cap 22 is moved by the element peripheral portion 26 as shown in FIG.
Is pushed upward in the direction away from the case 16, that is, above the position shown in FIG. Therefore, the upper surface 4 of the collar 30
6 is located closer to the lower surface 50 than the same height position as the upper surface 52 of the hook 36, and the upper surface 46 and the lower surface 5
The interval from 0 is slightly smaller than A. At this time,
The direction of the second columnar portion 70 of the key stick 40 is the vertical direction in FIG. That is, since the short-diameter direction of the first columnar portion 68 smaller than the interval A between the upper and lower surfaces 50 and 52 of the hook 36 is in a direction substantially coinciding with the vertical direction in the figure, the first columnar portion 68 and the hook 36 No pressing force acts between the flange and the flange 30. However, as described above, the upper and lower surfaces 46,
Since the interval of 50 is smaller than A, a small pressing force may be generated from the beginning depending on the relative magnitude relationship.

Then, after fitting into the direction and position shown by the dashed line in FIG.
The first columnar portion 68 is rotated by about 90 degrees along the side wall surface in the direction of arrow C around the axis of the first columnar portion 68 to the position shown by the solid line. In this turning process, the diameter in the vertical direction passing through the center of the first columnar portion 68 having a substantially elliptical cross section toward the lower surface 50 of the hook 36 becomes smaller as the turn is made, when inserted into the recess 54. And the outer peripheral surface 72 has a lower surface at a rotation angle whose value substantially matches A (more precisely, a rotation angle matching the distance between the upper and lower surfaces 46 and 50 slightly smaller than A). 50, and thereafter, a pressing force that increases as the rotation angle increases acts on the outer peripheral surface 72 from the lower surface 50. That is, the elliptical outer peripheral surface 72 functions as a cam surface, and this pressing force is applied to the diameter of the portion of the outer peripheral surface 72 of the first columnar portion 68 that is in contact with the lower surface 50 of the hook 36 and the element peripheral portion 26. The value corresponds to the difference between the gap between the upper surface 46 and the lower surface 50 in the initial state where the flange 30 is pushed up. Therefore, the upper surface 46 of the flange 30 is pressed toward the flange 28 of the case 16 by the portion located at the lower end of the outer peripheral surface 72 based on the pressing force, and the flanges 28, 30 and The element peripheral edge portion 26 sandwiched therebetween is elastically compressed and contracted, so that the first columnar portion 68 is connected to the hook 36,
The case 16 and the cap 22 are fastened to each other by a simple operation of merely fitting them into the recesses 54, 60 of the 38 and turning them.
In addition, even in this fastening state, since there is a gap between the flanges 28 and 30, even if there is a manufacturing error in the thickness dimension or the like of the flange 30, the elastic deformation of the element peripheral portion 26 absorbs the manufacturing error. A reliable sealing state can be obtained.

At this time, when rotating the key rod 40 for fastening, the fulcrum of the first columnar portion 68 to be rotated is located on its axis, and the point of force is located at a distance L1 from the axis. The point of action (load point) is located at the tip of the two columnar portions 70, and the first columnar portion 6 is separated from the axis by a distance L2.
8, the distance L1 can be set to a relatively large value with respect to the distance L2 irrespective of the thickness dimensions of the flanges 28, 30 and the element peripheral portion 26. Therefore, the force required for turning the key rod 40 determined by the ratio L2 / L1, that is, the assembly load for fastening can be made a relatively small value. As is clear from the above description, in the present embodiment, the portion of the first columnar portion 68 that is fitted into the hook 36 is the second engaging portion, and the outer peripheral surface 72 and the flat surface 74a are the second engaging portion. The outer peripheral surface 7
2 and the flat surface 74b are on the peripheral edge pressing surface, and the second columnar portion 7
0 corresponds to the operation unit.

At the end of the rotation indicated by the solid line in FIG. 3, that is, in the fastened state, the flat surface 74a is in contact with the lower surface 50 of the hook 36.
The diameter of the first columnar portion 68 provided with the maximum is at the ridge line at the boundary between the curved surface portion of the outer peripheral surface 72 and the flat surface 74. Therefore, the pressing force that acts on the outer peripheral surface 72 from the lower surface 50 based on the difference between the diameter of the contact portion and the interval A is slightly increased from the position shown by the solid line in the figure until the ridgeline of the boundary comes to the uppermost position. In the range of the moving angle, the larger the angle is, the more clockwise, that is, the direction of the loosening of the fastening. Therefore, in order to rotate the first columnar portion 68 clockwise from the position shown in FIG. 3, it is necessary to withstand a pressing force greater than the fastening state shown in the figure, and the first columnar portion 68 is slightly rotated. When it is moved, a rotational force in a direction of returning to the fastening state shown in the figure is generated by the increased pressing force thereby,
Rotation of the key rod 40 due to an external factor such as vibration, and thus, disengagement of the key rod 40 are suitably suppressed.

In this embodiment, in addition to the hook 36 on the case 16 side, a hook 38 corresponding to a third engaging portion is provided on the cap 22, and when fastening the case 16 and the cap 22, A portion of the first columnar portion 68 which is located on the side opposite to the hook 36 with respect to the second columnar portion 70 is fitted into the hook 38. Therefore, a pressing force acts on the first columnar portion 68 from the lower surface 50 of the hook 36 and the first columnar portion 6
8 in a fastening state in which a reaction force acts on its upper surface 46.
One end of the first columnar portion 68 on the hook 38 side is pushed up by the reaction force acting from the first columnar portion 6 and the first columnar portion 6
8 is preferably prevented from tilting and extending from the hook 36 at the other end. That is, the hook 38
Functions as a device for suppressing the inclination of the first columnar portion 68 of the key stick 40. Since such an inclination suppressing function is obtained when the outer peripheral surface 74 of the first columnar portion 68 comes into contact with either the lower surface 58 of the hook 38 or the upper surface 52 of the hook 36, the lower surface 58 and the upper surface 52 It is sufficient if at least one of them is configured to be brought into contact with the outer peripheral surface 74 in the fastened state.

In this embodiment, the hook 36,
Since the right end in FIG. 3 has a hook shape, the first columnar portion 68 of the key stick 40 is disposed between the lower surface 50 of the hook 36 and the upper surface 46 of the flange 30 from the open side. Can be easily fitted. Therefore, the fastening operation is simpler.

Next, another embodiment of the present invention will be described. In the following embodiments, portions common to the above-described embodiments are denoted by the same reference numerals, and description thereof is omitted.

FIGS. 6 to 8 show the main parts of another fastening device 76 which can be used in place of the above-described fastening device 34. FIGS. It is a corresponding figure. However, FIGS. 6 to 8 show case 1
6 and the cap 22 are overlapped with the element 24 inserted therebetween, but the flanges 28 and 30 are not yet pressed by the fastening device 76, that is, the fastener is not fastened. In the figure, a hook 78 connected to the flange 28 is provided on the side surface of the case 16 so as to protrude from the open end thereof toward the cap 22. Hook 7
8 is provided between a pair of first portions 80a and 80b extending from the flange 28 toward the cap 22 and an upper end thereof located above the upper surface 46 of the flange 30 (ie, on the side separated from the case 16). And a second portion 82. Therefore, the hook 78 has an inverted U shape as a whole when viewed from the front as shown in FIG. 6, and the lower surface 84 of the second portion 82 facing the flange 30 is substantially parallel to the upper surface 46. Further, the ridge portion between one surface of the first portion 80a and the one surface of the other first portion 80b is removed from the first portion 80a. A cylindrical concave surface 86 extending along a direction perpendicular to the paper surface is provided.

The hook 7 is provided on the side surface of the cap 22.
A hook 38 is provided at a position opposite to the hook 8. The hook 38 has a shape substantially similar to that provided in the fastening device 34. However, in the non-fastened state shown in the figure, the lower surface 64 of the second portion 58 is located slightly above the lower surface 84 of the second portion 82 of the hook 78.

The key rod 88 to be engaged with the hooks 78 and 38 has a first columnar portion 90 having a substantially oval cross-sectional shape, and a substantially circular cross-section extending vertically from the center in the axial direction. Or the chamfered rectangular second columnar portion 9
And 2. The first columnar portion 90 and the second columnar portion 92 are formed such that the center of the circular cross section of the first columnar portion 90 on the inner peripheral side with respect to the arc shown by the dashed line in FIG. 6 is the axis of the second columnar portion 92. Are located on a straight line passing through. In the illustrated non-fastened state, the second columnar portion 92 is substantially perpendicular to the upper surface 46 of the flange 30. In this state, the second columnar portion 92 expands to the outer side with respect to the center of the circular cross section and the dashed line. A line connecting a vertex of a portion (nose) 94 shown by oblique lines in the drawn diagram is an angle θ with respect to the upper surface 46.
It is only in front of the counterclockwise rotation direction.

A guide groove 96 is provided on the outer peripheral surface of the central portion of the first columnar portion 90 in the axial direction along the circumferential direction. This guide groove 96 is approximately from the lower end position in the drawing.
It is formed over a range of 90 degrees, and has a hemispherical recess 98 at its terminal end in the clockwise direction having a diameter larger than the width dimension of the guide groove 96 and deeper than its depth.
The recess 98 is formed in a size corresponding to the hemispherical projection 100 provided on the upper surface 46 of the flange 30. That is, the projection 100 is provided in such a size that only the tip thereof enters the guide groove 96 but the whole recess 98 enters.

When the case 16 and the cap 22 are fastened by the fastening device 76 configured as described above,
After superimposing them so that the cross section shown in FIG. 7 is obtained, the key rod 88 is moved in such a manner that the axial direction of the first columnar portion 90 is parallel to the upper surface 46 of the flange 30 as shown by the dashed line in FIG. Along the longitudinal direction, the second columnar portion 92 is inserted between the hooks 78 and 38 at a position where the axis of the second columnar portion 92 is perpendicular to the upper surface 46 and the axis coincides with the axis of the projection 100. At this time, the tip of the projection 100 is fitted into the guide groove 96. At this stage, the protrusions 10
0 is not included, the first columnar portion 90 is
6 is located slightly away from it.

Next, the key rod 8 is rotated by 90 degrees in the counterclockwise direction indicated by the arrow D in FIG. 8 around the axis of the second columnar portion 92.
8 is rotated. As a result, one end of the first columnar portion 90 is inserted into the hook 78 and the other end is inserted into the hook 38, as shown by the solid line in FIG. At this time, the first portion 80a of the hook 78 is provided with the cylindrical concave surface 86 by removing the ridge on the projection 100 side. Does not interfere with the portion 80a. Further, since the movement of the first columnar portion 90 in the direction along the upper surface 46 is suppressed by the fitting of the guide groove 96 and the projection 100, the first columnar portion 90 and the hooks 78, 38 at the end of the rotation. Means that they are positioned in a predetermined positional relationship.

Then, the second columnar section 92 is moved along the side wall surface of the cap 22 substantially in the direction of arrow E shown in FIG. 6 around the axis of the circular section of the first columnar section 90 shown in FIG. Rotate degrees. In this rotation process, the hook 78 is moved from the rotation center of the first columnar portion 90 having a substantially oval cross section.
Since the diameter in the vertical direction toward the lower surface 84 increases from the diameter at the time of insertion into the hook 78 as it rotates,
The pressing force that increases as the rotation angle increases becomes lower surface 84.
Acts on the outer peripheral surface 102 of the first columnar part 90. That is, in this embodiment, the substantially egg-shaped outer peripheral surface 102 functions as a cam surface. Therefore, the upper surface 46 of the flange 30 is pressed toward the flange 28 of the case 16 by the portion located at the lower end of the outer peripheral surface 102 based on the pressing force, and the flanges 28, 30 and The first columnar portion 90 is hooked with the hook 78, by elastically compressing the element peripheral portion 26 sandwiched therebetween.
The case 16 and the cap 22 are fastened to each other by a simple operation of fitting the inside of the case 38 and turning it.

In the above-mentioned fastening state in which the key rod 88 is rotated by about 90 degrees, the tip located at the outermost side from the rotation axis of the outer peripheral surface 102 in a substantially oval shape is in contact with the lower surface 84. It is further rotated by the angle θ in the left direction in the figure. Therefore, the distance from the center of rotation to the outer peripheral surface 102 at the position where it is in contact with the lower surface 84 at the fastening completed position is smaller than the maximum value. In the early stage of the movement, the pressing force acting from the lower surface 84 to the outer peripheral surface 102 increases as the rotation is made, and the turning force in the direction of arrow E, that is, the fastening direction acts on the first columnar portion 90 based on the pressing force. Therefore, also in the structure of the present embodiment, the disengagement due to vibration or the like during use is suitably suppressed.

When rotating in the direction of arrow E as described above, the tip of the projection 100 on the upper surface 46 of the flange is moved to the first columnar portion 9.
0 is maintained in a state fitted in the guide groove 96. For this reason, even if a pressing force acts on the first columnar portion 90 from the hook 78 with the rotation, the position of the key rod 88 is displaced thereby, making the fastening operation difficult, or making it easy to lose the fastening. There is no such thing. Further, at the rotation end position, the entire outer periphery 102 of the first columnar portion 90 is fitted on the flange upper surface 46 by fitting the entirety of the projection 100 into a recess 98 provided at the tip of the guide groove 96. Be in contact with you. Therefore, in order to rotate in the loosening direction from the fastening state, it is necessary to release the fitting state between the projection 100 and the recess 98 and to separate the outer peripheral surface 102 from the flange upper surface 46. The pressing force acting on the outer peripheral surface 102 from the lower surface 84 of the hook 78 during the initial rotation of the hook 78 is further increased. In the present embodiment, the loosening of the fastening is further suppressed based on the fitting of the projection 100 and the recess 98.

FIGS. 9 and 10 are a plan view and a front view showing the entirety of an air cleaner device 10 provided with a fastening device 104 according to still another embodiment. In this embodiment,
The fastening device 104 includes a key stick 106 provided integrally with the case 12, a key stick insertion part 108 provided integrally with the cap 22, and a clamp (fastening part) 110 independent of these. .

As shown in the plan view, front view and back view of the key stick 106 in FIGS.
A base 112 having a rectangular shape and a thickness similar to that of the flange 28, and a cylindrical shaft 114 protruding from the base 112 in a direction perpendicular to the upper surface thereof. And a columnar projection 116 protruding in the radial direction from the side surface near the tip of the shaft portion 114. The projection 116 is provided so that its axis is orthogonal to the axis of the shaft 114, and the direction in which it projects is the same as the direction in which the base 112 projects from the flange 28. That is, it is parallel to the upper surface 118 of the collar 28 and perpendicular to its edge. For example, when the case 16 is injection-molded, the key rod 106 is provided with a gate for injecting a resin into the flange 28.
By being provided in a direction perpendicular to the gate, the gate can be made of resin injected into the gate. In the case of such a mold configuration, the key stick 106 having no nest and having a sufficiently large diameter is used.
Can be easily obtained.

Further, the key stick insertion section 108 is
As shown in plan views, front views, and rear views in (a) to (c), the planar shape of the cap 22 protruding outward from the flange 30 having a Γ-shaped cross section is rectangular and has the same height as the flange 30. A pair of parallel projections 120, 120 having dimensions, a recess 122 formed between the projections 120, 120;
And a semi-annular projection 124 provided on the flange upper surface 46 at a position surrounding the recess 122. The recess 122 has an opening width dimension sufficiently larger than the diameter of the key stick 106. The inner surface 126 on the inner side of the recess 122 is located inside the edge of the flange 30, and the inside of the recess 122 has a flange 30.
Of these, there is no portion that hangs down.

Further, the clamp 110 is provided as shown in FIG.
(a) to (c) are plan views, front views, and rear views, as shown in the plan view, a part in the circumferential direction is recessed to the center and another part is significantly enlarged, It is a columnar body including an engaging portion 128 including the recessed portion and an operating portion 130 including a portion enlarged in the circumferential direction, and has upper and lower surfaces 132 and 134 parallel to each other. In addition, clamp 1
Reference numeral 10 is made of the same resin material as the case 16 and the cap 22.

The concave portion 136 formed by the concave portion provided in the engaging portion 128 is formed by penetrating between the upper and lower surfaces 132 and 134 and having the innermost wall surface formed in the cylindrical concave surface 136a. The opening width dimension on the side surface 138 side is slightly larger than the diameter of the shaft portion 114 of the key stick 106 on the lower surface 134 side. Further, the recess 136 has an opening width dimension that is substantially doubled in a range closer to the upper surface 132 than the intermediate portion in the height direction. Key stick 10
A projection support surface 140 for supporting the six projections 116 is provided. The projection support surface 140 is a smooth inclined surface having a substantially constant width dimension and a substantially constant inclination angle that inclines so as to approach the upper surface 132 from the side surface 138 side toward the inner peripheral portion. However, at the inner peripheral end located behind the cylindrical concave surface 136a, the height from the lower surface 134 is slightly lower than that immediately before due to the provision of the depression 142.

The lower surface 134 of the engaging portion 128 is provided with a semi-circular groove 144 at a position around the cylindrical concave surface 136a. The semi-annular groove 144 receives the semi-annular projection 124 as described later, and has a width slightly larger than a radial dimension of the semi-annular projection 124 and a height of the semi-annular projection 124. Also have a slightly larger depth dimension.

When the case 16 and the cap 22 are fastened via the filter element 24 by the fastening device 104 having the components as described above, first,
They are overlapped so that the key stick 106 is inserted into the recess 122 of the key stick insertion portion 108. In this superimposed state, the axis of the shaft 114 of the key stick 106 coincides with the axis of the semi-annular protrusion 124. The key stick 106 and the key stick insertion unit 108 are provided at positions where such a positional relationship is realized. FIG. 14 (a) shows a point in time when the keys are overlapped in this way, and the key stick 106 is positioned about half of the entire length above the flange 30, and the protrusion 116 On the other hand, on the side opposite to the flange 28, it is located sufficiently above the flange upper surface 46 and the semi-annular protrusion 124.

In the subsequent step, as shown by the arrow in FIG. 14A, the clamp 110 is fitted to the key stick 106 from the tip end side. FIG. 14B shows this stage. At this time, the center of the semi-annular groove 144 provided on the lower surface 134 of the clamp 110 is aligned with the axis of the shaft portion 114, and the semi-annular projection 124 is fitted into the semi-annular groove 144. Become. Thereby, the clamp lower surface 134 is brought into close contact with the flange upper surface 46, and
Substantially the entire part of the key stick 106 protruding above the upper surface 46 of the flange 30 is accommodated in the recess 136. Further, the projection 116 of the key stick 106 is located slightly above the height position at the end of the projection support surface 140 on the side surface 138 side.

As described above, the key stick 10 is
After fitting 6, the operation part 130 is grasped and rotated clockwise around the axis of the key stick 106 in a plan view while pressing the clamp 110 toward the flange 30. At the time of slight rotation, the projection supporting surface 140 of the clamp 110 is positioned below the projection 116 of the key stick 106 in a non-contact state. By further rotating, the projection supporting surface 140 is separated from the lower surface 134 toward the inner peripheral side by being inclined so that the projection 1
The lower surface 16 contacts the lower surface, and is further pushed down by the protrusion 116 toward the upper surface 46 of the collar. During this rotation, the semi-annular projection 124 is fitted into the semi-annular groove 144, and the axis of rotation coincides with the axis of the projection 124 and the groove 144. By being guided by 124, the clamp 110 is rotated without shifting the position of the upper surface 46 of the flange 30 in the surface direction.

As described above, the projection support surface 140 is
6 while being in sliding contact with the lower end 146 of the outer peripheral surface of the clamp 6.
When the rotation of the protrusion 0 is performed, the protrusion 116 is guided in a direction relatively separated from the flange 30 by the protrusion support surface 140 which is gradually increased, and the protrusion support surface 140 is extended.
The pressing force that gradually increases in accordance with the height of the
And acts on the upper surface 46 of the collar 30 via the lower surface 134 of the clamp 110. Therefore, the flange 30 is pressed by the flange 28 via the element peripheral edge portion 26, and they are fixed in a pressed state. FIG. 15 shows a fastening state in which the clamp 110 has been rotated clockwise by about 180 degrees from the initial position where the clamp 110 was fitted to the key stick 106 as described above. In the turning operation for fastening, the axis of the shaft 114 is the fulcrum, the operating part 130 is the fulcrum, and the projection 116 is the point of application. As shown in FIG. -The distance L2 between the action points is set irrespective of the thickness dimension of the flanges 28, 30, etc.
1 is sufficiently larger than L2. Therefore, also in this embodiment, the mounting load can be reduced without complicating the configuration. In the present embodiment, when the clamp 110 rotates, the operation unit 130 is
Of the operation unit 130
It is not preferable to lengthen the distance, but as is clear from FIG. 15, the distance L2 between the fulcrum and the point of application is extremely small. We can secure enough. Further, in this embodiment, the key rod 106 is attached to the first engagement portion,
6 has a lower end 146 on the first sliding contact surface and the clamp 110
The engagement portion 128 of the second engagement portion has a projection support surface 140
Correspond to the second sliding contact surface, and its lower surface 134 corresponds to the peripheral edge pressing surface.

In the fastening state shown in FIG. 15, the projection 116 of the key stick 106 is
Is fitted in a recess 142 provided at the inner peripheral side end portion. Therefore, when the clamp 110 is rotated in the counterclockwise loosening direction in the drawing to release the fastening state, the flange 30 is pressed with a pressing force larger than the value in the fastening state to release the protrusion 116 from the recess 142. It is necessary to press down on the upper surface 46. Therefore, when the clamp 110 is slightly rotated in the loosening direction due to vibration or the like during use of the air cleaner device 10, the projection supporting surface 140 located at a position higher than the depression 142.
Since the turning force in the fastening direction acts due to the pressing force that increases until the vehicle crosses the boundary between the two, the disengagement of the fastening is also suitably suppressed in the present embodiment. Note that FIG.
Reference numeral 10 denotes a clamp 1 as shown in FIG.
10 shows a non-fastened state in which only the flange 10 is placed on the collar 30.

Incidentally, as described above, the case 16, the cap 22, and the clamp 110 are all made of the same resin material, and are manufactured by injection molding. FIG. 16 shows the molded case 16 or cap 2
17 is a plan view showing a main part of FIG. 2, and FIG.
It shows the II-XVII cross section. A clamp 11 is attached to a part of the molding die (not shown) of the case 16 or the cap 22.
The cavities for molding 0 are integrally provided, and the cavities of the case 16 or the cap 22 and the clamp 110 are connected via a gate for resin injection. Therefore, as shown in the figure, the molded case 16 or cap 22 and the clamp 110 are connected by a connecting portion 148 derived from the gate, and are integrated. Therefore, since it is not necessary to separately prepare a molding die for molding the clamp 110, the cost of the mold can be reduced, and the clamp 110 is connected by the connecting portion 148 at least to the assembly site where the air cleaner device 10 is assembled. The clamp 110
There is also an advantage that the loss can be suppressed by stripping off. If there is no problem in the fastening operation, the clamp 110
Is kept connected to the case 16 or the cap 22 at the connection portion 148, loss during element replacement can be suppressed.

FIGS. 18 to 20 are views for explaining still another fastening structure. FIG. 18 (b) shows a key used in this fastening structure in a state where the case 16 and the cap 22 are overlapped to fasten each other. The front view showing the rod 150, (a)
It is a top view of the key stick 150. The key rod 150 is integrally protruded from the flange 28 of the case 16 in a direction perpendicular to the upper surface 118 thereof, and has a tip located above the flange 30 of the cap 22 when fastened. The outer peripheral surface 152 is provided with a pair of protrusion insertion grooves 154 and a pair of protrusion engagement grooves 156 at two positions symmetrical in the circumferential direction in a range protruding above the flange 30. In FIG. 18B, only one protrusion insertion groove 154 and only one protrusion engagement groove 156 required for description are shown.

The pair of projection insertion grooves 154 are
It is provided in a direction substantially along the direction of the axis 0 and extends over a range from the front end face 158 to an intermediate portion in the direction of the axis. The pair of projection engaging grooves 156 are provided in a direction substantially along the circumferential direction of the key rod 150 and in a range less than a half of the circumference thereof, and at one end (base end) of the flange 28 of the projection inserting groove 154. To the lower end of the side. As the projection engagement groove 156 is separated from the projection insertion groove 154,
That is, the inner wall surface 160 on the tip end surface 158 side forms a spiral shape approaching the flange 28 toward the terminal end side in the circumferential direction. The projection engaging groove 156 has a tendency to approach the flange 28 toward the end as a whole, but a concave portion 162 extending toward the distal end surface 158 by a small length is provided at the end. Therefore, the inner wall surface 160
Is located closer to the distal end surface 158 in the recess 162 than to a position slightly closer to the proximal end. The key stick 15
The depth dimension and the width dimension in the radial direction of 0 are substantially uniform over the entire length from the base end on the distal end face 158 side of the projection insertion groove 154 to the depression 162, and the terminal end provided with the depression 162 Has an arc shape having a diameter substantially equal to the width dimension of the portion.

FIG. 19A is a plan view showing a clamp 164 which is another component of the fastening structure and which is fitted to the key rod 150, and FIG. It is -b sectional drawing. The clamp 164 is connected to the case 16
And an operating portion integrally formed by enlarging a part of the outer peripheral surface 168 to the outer peripheral side. 170. The engagement portion 166 and the operation portion 170 have substantially uniform thickness dimensions, and have upper and lower surfaces 172 and 174 parallel to each other. The substantially annular engaging portion 166 has a hole penetrating in the thickness direction, that is, a cylindrical inner peripheral surface 176, and a pair of two centrally symmetrical positions in the thickness direction. Are projected. The pair of projections 178 have the same size as each other, and their axial directions are all directed to the radial direction of the inner peripheral surface 176, and are located opposite to each other. The diameter of the inner peripheral surface 176 is slightly larger than the diameter of the key rod 150. The length of the projection 178 is slightly shorter than the depth of the projection engagement groove 156 and the like, and the diameter of the projection 178 is
6 is slightly smaller than the opening width dimension.

The key stick 150 and the clamp 1 as described above
The fastening device constituted by 64 is used as follows. First, the case 16 and the cap 22 are overlapped as shown in FIG.
As shown in FIG. 20, a clamp 164 is attached to the key rod 150 located on the side of the flange 30 of the cap 22 or in a rectangular or arc-shaped notch 180 provided on the flange 30 as shown in FIG. Fit. At this time, the lower surface 172 of the clamp 164 is parallel to the upper surface 46 of the flange 30 and the protrusion 178 is positioned on the protrusion insertion groove 154. For example, the protrusion insertion groove 154 extends along the longitudinal direction of the flange 30. If they are provided on a straight line, the protrusion 178 is located on the straight line, and the
It is fitted in a direction substantially perpendicular to the edge of the zero.

Next, after the clamp 164 is inserted until the projection 178 comes into contact with the lower end surface 182 of the projection insertion groove 154, the operation unit 170 is grasped, and the operation is performed in the direction indicated by the arrow in the figure, that is, in the clockwise direction in FIG. The clamp 164 is rotated around the axis of the key rod 150. As a result, the clamp 164 is rotated while the projection 178 is guided in the projection engagement groove 156, but the projection engagement groove 156 is inclined so as to approach the flange 30 toward the terminal end. Therefore, the protrusion 178 guided toward the terminal end is made closer to the flange 30 as the rotation angle increases. For this reason, the upper end 184 of the outer peripheral surface of the projection 178 is pressed toward the flange 30 by the upper inner wall surface 160 of the projection engagement groove 156, and the clamp 164 is further extended.
The flange 30 is pressed toward the flange 28 by the lower surface 172 by being pressed toward the upper surface 46 of the zero. In this embodiment, the upper inner wall surface 1
60 corresponds to the first sliding contact surface, the upper end 184 of the outer peripheral surface of the projection 178 corresponds to the second sliding contact surface, the lower surface 172 of the clamp 164 corresponds to the peripheral pressing surface, and the fulcrum corresponds to the axis of the key rod 150 and the power point. The tip and the action point of the operation unit 170 are the contact points between the projection 178 and the inner wall surface 160. Therefore, similarly to the case of the above-described fastening device 104, the distance between the fulcrum and the force point is set as the fulcrum-
Because it can be set sufficiently large compared to the distance between action points,
In particular, the assembly load can be reduced without complicating the configuration.

Further, as described above, the clamp 164 is
When the protrusion 178 reaches the terminal end of the protrusion engagement groove 156 by being rotated by slightly more than 90 degrees, the element peripheral edge portion 26 elastically compressed by the flange 30 pressed down by the lower surface 172 thereof (FIG. 18B The protrusion 178 is pushed up so as to enter the recess 162 by the action of the restoring force shown in FIG. The dashed line in FIG. 20 indicates a state in which the fastening is completed by rotating to the end as described above. Therefore, the pressing force acting from the inner wall surface 160 of the projection engagement groove 156 to the upper end 184 of the outer peripheral surface of the projection 178 in such a fastening completed state is slightly smaller than the value immediately before entering the recess 162. Therefore, the projection 178 is in the projection engagement groove 1
To return to 56 and move to its proximal end,
Since it is necessary to escape from the dent 162 against a pressing force larger than the pressing force in the fastening state, in this embodiment, the loosening due to vibration or the like during use is suitably suppressed.

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be implemented in other embodiments.

For example, in the above-described embodiment, the case where the fastening structure of the present invention is applied to the air cleaner device 10 has been described. However, the present invention resiliently presses the peripheral portions of the two parts. As long as it can be fastened, it can be similarly applied to a fastening structure for devices and articles for various other uses.

Further, in the embodiment, the flanges 28 and 30 having a relatively high elastic modulus are fastened with the element peripheral edge 26 having a relatively low elastic modulus interposed therebetween, so that only the restoring force of the element peripheral edge 26 is reduced. Although the case where a strong fastening structure is obtained and its disengagement is suppressed has been described based on this, the existence of such an intermediate member having a low elastic modulus is not essential. For example, a fastening part (key stick or clamp) 4
When two components having sufficiently low elastic moduli of the components (the flange 30 in the embodiment) of the pressed surface pressed by 0, 88, 110, 164, etc. are fastened, the elasticity of the low elastic moduli components Based on the deformation, a strong fastening structure similar to the embodiment can be obtained.

Further, in the embodiment, the case where the case 16 and the cap 22 both made of resin are fastened by the fastening parts (key bar 40 or the like) made of the same resin has been described. The present invention is similarly applied to a case where a metal material component is fastened or a case where a metal material fastening component is used, as long as the material is made of a usable material. Further, as long as the structure is fastened through a low elastic modulus member such as the element peripheral portion 26, even if the two parts to be fastened are both made of an inorganic material or the like and having a very low elastic modulus. No problem.

The fastening device 3 shown in FIGS.
4 and 76, the first columnar portions 68 and 90 of the key rods 40 and 88 which press the flange 30 by being engaged with the hooks 36 and 78 have an oval cross section or an oval shape in which both long-side ends are flat. Although they have a cross-sectional shape, these shapes can be changed as appropriate. That is, if the first columnar portions 68 and 90 have a cam surface such that the distance from the rotation axis to the outer peripheral surface gradually increases in the circumferential direction, the first columnar portions 68 and 90 do not have the flat surface 74 and are complete. The shape may be an elliptical shape, a shape having a part with a large diameter in a part of a circular cross section, or an appropriate shape such as a chamfered triangle or square.

Further, in the fastening devices 34 and 76, in addition to the lower surfaces 50 and 84 provided on the hooks 36 and 78 for pressing the first columnar portions 68 and 90 toward the flange 30, the first columnar portions are also provided. The cap 38 is provided with a hook 38 into which the other ends of the parts 68 and 90 are inserted. For example, the hook 38 has a sufficient rigidity of the hooks 36 and 78 or a sufficient width dimension of the lower surface 50 thereof. By increasing the size, the hook 36 at the time of fastening or in the fastened state,
When the inclination of the first columnar portions 68 and 90 pressed by 78 can be suppressed, the first columnar portions 68 and 90 are not necessarily provided.

In the embodiment, the case 16 and the cap 22 are configured to be rotatable around the hinge device 32 provided on one side of the peripheral portion thereof. However, the hinge device 32 is not provided, and the filter is not provided. The present invention is similarly applied to the air cleaner device 10 configured to remove the cap 22 from the case 16 when the element 24 is replaced. In such a configuration, case 16
In order to ensure that the cap 22 is maintained in the fastened state, for example, some engagement structure is provided on one side on which the hinge device 32 is provided, or on one side or near the side on which the hinge device 32 is provided. The fastening device 34 may be provided.

Further, in the embodiment, the case where the fastening devices 34 and the like are provided at two places on the periphery of the case 16 and the cap 22 has been described, but the number thereof is within a range in which a sufficient fastening state can be ensured. The number is appropriately set, and may be one or three or more.

In the fastening devices 34 and 76, the key rods 40 and 88 are positioned 90 degrees from a direction substantially perpendicular to the flange 30.
The description has been given of the case where the fastening state is attained by rotating by about degrees, but the initial direction and the rotating angle can be appropriately changed. However, in order to suppress a situation in which the key rods 40, 88 are inadvertently touched and the fastening is released, in the fastened state, the key rods 40, 88 are moved in the axial direction of the flange 30 as shown in the embodiment. It is preferable to be configured along the longitudinal direction.

In the fastening device 76, the key rod 88
6 is provided at the end with a recess 98 for suppressing the rotation from the rotation end position, that is, the fastening position, while guiding the flange to stay at a predetermined position when it is rotated in the direction of arrow E in FIG. Although the guide groove 96 for guiding the protrusion 100 of the upper surface 30 is provided on the outer peripheral surface 102 of the first columnar portion 90, these are not necessarily provided. That is, the key rod 88 has both ends of the first columnar portion 90 at the hook 7.
8 and 38, the position is not so changed even if the guide groove 96 is not engaged with the projection 100, and the first columnar portion is in the fastened state. Since 90 is further rotated by the angle θ from the vertex of the oval cross-section, rotation in the loosening direction is unlikely to occur. Therefore, the case 16 and the cap 22 can be connected to each other without providing the engagement structure as described above. There is no particular hindrance to the conclusion.

In the fastening devices 34 and 76, the first pillars 68 and 90 of the key rods 40 and 88 are formed to have a substantially uniform cross section in the axial direction.
Since the portion other than the portion that is brought into sliding contact with 78 does not contribute to the pressing of the flange 30 at all, a perfectly circular cross section may be used.

In the fastening devices 34 and 76, the first
The major and minor diameters of the columnar portions 68 and 90 and the second columnar portions 70 and 9
The relative magnitude relationship with the diameter of 2 is not limited to that shown in the embodiment, and the first columnar portions 68 and 90 do not necessarily have to be provided so as to protrude in the radial direction of the second columnar portions 70 and 92. .

In the fastening device 76, a portion of the outer peripheral surface 102 of the first columnar portion 90, which is slidably contacted with the lower surface 84 of the hook 78, is configured such that the distance from the rotation axis changes in the circumferential direction. However, the portion to be slid and contacted is formed in a perfect circular cross section, and the upper surface 46 of the flange 30 is formed.
A similar pressing and fastening effect can be obtained even if the portion that is slid in contact with is configured so that the distance from the rotation axis in the circumferential direction changes.

Further, in the fastening device 104, the key rod insertion portion 108, which is a component thereof,
Projecting from a part of the outer peripheral side.
Is determined based on the relative size relationship between the width of the flange 30 and the diameter of the engaging portion 128 of the clamp 110 so that an area necessary for rotating the clamp 110 can be secured. Determined. That is, when the diameter of the clamp 110 is made larger than that shown in the embodiment with respect to the width of the flange 30, it is preferable to provide the protrusion 120 longer, but conversely, the diameter of the clamp 110 is made smaller. In this case, the length of the protrusion 120 is reduced or
By providing a hole or a notch in the key 0 for inserting the key stick 106, the projection 120 may not be provided.

In the fastening device 104, the key 1
Projection support surface 140 on which the projections 116 are slid.
Has been positioned entirely below the upper surface 132 of the clamp 110, but its inner peripheral end is
2, and the recess 142 may be formed by partially recessing the upper surface 132.

In the fastening device shown in FIGS. 18 to 20, the protrusion insertion groove 1 provided in the key rod 150 is provided.
54 and the projection engaging groove 156 are provided with the same opening width as the diameter of the projection 178 provided on the clamp 164, but these opening widths are appropriately changed within a range larger than the diameter of the projection 178. it can.

Further, the projection insertion groove 154 and the projection engagement groove 156 provided on the key stick 150 and the clamp 164
In the embodiment, a pair of the protrusions 178 are provided at two positions symmetrical with respect to the rotation axis. However, only one or about three protrusions 178 may be provided. .

Although not specifically exemplified, the present invention
The present invention can be implemented in various modified forms without departing from the spirit of the invention.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an overall configuration of an air cleaner device to which a fastening structure according to an embodiment of the present invention is applied.

FIG. 2 is a plan view of the air cleaner device of FIG.

FIG. 3 is an enlarged front view of a main part of the air cleaner device of FIG. 1 and illustrating a configuration of a fastening device in detail;

FIG. 4 is a plan view of the fastening device of FIG. 3;

FIG. 5 is a sectional view taken along line VV in FIG.

FIG. 6 is a view corresponding to FIG. 3 for describing a configuration of a fastening device according to another embodiment of the present invention.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a plan view of the fastening device of FIG. 6;

FIG. 9 is a plan view showing the entirety of an air cleaner device provided with a fastening device according to still another embodiment of the present invention.

FIG. 10 is a front view of the air cleaner device of FIG. 9;

11 (a) to (c) are a plan view, a front view, and a rear view, respectively, for explaining a key rod constituting a fastening device provided in the air cleaner device of FIG. 9;

12 (a) to 12 (c) are a plan view, a front view, and a rear view, respectively, for explaining a key rod insertion portion constituting a fastening device provided in the air cleaner device of FIG.

13 (a) to 13 (c) are a plan view, a front view, and a rear view, respectively, for explaining a clamp constituting a fastening device provided in the air cleaner device of FIG. 9;

FIGS. 14A and 14B are diagrams illustrating a fastening operation by a fastening device provided in the air cleaner device shown in FIG. 9;

FIG. 15 is a plan view illustrating a completed state of the fastening operation of FIG. 14;

FIG. 16 is a diagram illustrating a form of forming a case or a cap of the air cleaner device of FIG. 9;

17 is a sectional view taken along the line XVII-XVII in FIG.

FIGS. 18 (a) and (b) are a plan view and a front view, respectively, of a key rod constituting a fastening device according to still another embodiment of the present invention.

19 (a) is a plan view showing a clamp constituting a fastening device by being combined with the key rod of FIG. 18, and FIG. 19 (b) is a cross-sectional view taken along line bb in FIG. 19 (a).

FIG. 20 is a view for explaining a fastening method by the fastening device shown in FIGS. 18 and 19;

FIG. 21 is a view for explaining a problem of a conventional fastening structure using a clamp.

[Explanation of symbols]

 16: Case (first part) 22: Cap (second part) 24: Filter element (third part) 28: Flange (first peripheral part) 30: Flange (second peripheral part) 34: Fastening device 36: Hook (first engaging portion) 40: key stick (fastening part) 50: lower surface (first sliding contact surface) 68: first columnar portion (second engaging portion) 70: second columnar portion (operating portion) 72 : Outer peripheral surface (second sliding contact surface) 74: Flat surface (peripheral portion pressing surface)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomohiro Osuga 1-1-1 Toyota-cho, Kariya-shi, Aichi F-term in Toyota Boshoku Corporation (reference) 3J001 FA02 JB02 JB13 KA19 KB01 3J022 DA12 EA02 EB05 FB07 FB12 GA06 GA15 GA18

Claims (1)

[Claims] 1. A fastening structure for fastening a first component and a second component by overlapping a first peripheral portion of a first component and a second peripheral portion of a second component and mutually pressing the first component and the second component. And a first sliding surface facing the second peripheral portion is provided at a position opposite to the first component with respect to the second peripheral portion, and the first sliding surface faces from the first component to the second component. A first engaging portion extending from the first engaging portion; a second engaging portion provided on the fastening component so as to be engaged with the first engaging portion so as to be relatively rotatable around a predetermined rotation axis; In a state where the component is engaged with the first engagement portion, the component is provided on the second engagement portion so as to be in contact with the first sliding contact surface, and the fastening component has a fastening direction around the predetermined rotation axis. The second sliding contact surface in which the pressing force applied from the first sliding contact surface is increased as the rotation is made A peripheral portion pressing surface provided on the fastening component so as to press the second peripheral portion toward the first peripheral portion based on the pressing force; and A fastening unit, comprising: an operation unit provided on the fastening component at a position separated by a predetermined distance from the rotation axis so as to rotate around the predetermined rotation axis with respect to the joint part.